关于开展地文监测的初步设想

地球上过去到底是什么样子,将来会是什么样子?人们始终没有一个明确的概念。而它所论述的地文监测将解决这一问题。通过一段较长时期的地文监测工作,将为人们科学客观地展现地球的过去和未来。这项工作具有划时代的意义,这将是一份留给子孙后代的不可再生和替代的宝贵财产和礼物。它就地文监测工作的大致范围,测量方法以及实施的可行性作了简单说明。     

人性之善也,犹水之就下也——孟子与水(一)

孟子作为亚圣,学问深得孔子的嫡传,但孔孟还是有差别的,比如孟子远比孔子善辩。孔子提出君子要敏于行而讷于言(其实孔子一生也没少说话,一部《论语》就是他讲话精华部     

食说

中国人一生中讲的最多的字是什么?未必不是吃字。因为逢人打招呼总得问:吃了么?这可谓是人生第一紧要的事。吃、喝、拉、撒、睡,吃排第一,但凡动物,莫不     

Discussion of Muskingum method parameter X

The parameter X of the Muskingum method is a physical parameter that reflects the flood peak attenuation and hydrograph shape flattening of a diffusion wave in motion. In this paper, the historic process that hydrologists have undergone to find a physical explanation of this parameter is briefly discussed. Based on the fact that the Muskingum method is the second-order accuracy difference solution to the diffusion wave equation, its numerical stability condition is analyzed, and a conclusion is drawn： X ≤ 0.5 is the uniform condition satisfying the demands for its physical meaning and numerical stability. It is also pointed out that the methods that regard the sum of squares of differences between the calculated and observed discharges or stages as the objective function and the routing coefficients C0, C1 and C2 of the Muskingum method as the optimization parameters cannot guarantee the physical meaning of X.